1. Aafco Op Association of American Feed Control Officials, Official Publication (www.aafco.org).
2. Lead contamination of feedingstuffs 1989: Report on the composition of contaminated feeds, ADAS internal document, Ministry of Agriculture;Adamson,1990
3. TASCC Code of Practice for Road Haulage of Combinable Crops and Animal Feeds;Aic,2009
4. FEMAS Feed Materials Assurance Scheme International Core Standard;Aic,2009
5. UFAS Universal Feed Assurance Scheme Compound Feed Code of Practice;Aic,2009